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2 Sheets Sheet 2.

(No Model.)

J. PRIDLEY.

HOT AIR PURNAOE.

IPa/nentedJune 14, 1892. W

i lllllllllllll UNITED STATES PATENT OFFICE.

JACOB FRIDLEY, OF GARLISLE, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO .VVILLIAM A. DARE, OF SAME PLACE.

HOT-AIR FURNACE.

SPECIFICATION forming part of Letters Patent No. 476,877, dated June 14, 1892.

Application filed January 18, 1892. Serial No. 418,478. (No model.)

T at whom it may concern.

Be it known that I, JACOB FRIDLEY, a citizen of the United States, residing in Carlisle, in the county of Cumberland and State of Pennsylvania, have invented a new and useful Hot-Air Furnace, of which the following is a specification.

This invention relates to hot-air furnaces; and it has for its object to provide a furnace IO having an increased radiating area, whereby a greater amount of heat is collected and conducted from the furnace than in those of most ordinary use; and it is also an essential object of the present invention to provide an inclosr 5 ing casing forinclosing the various parts of the furnace and which may be readily and easily removed without disturbing any of the framework for the purpose of gaining access to the interior of the furnace for cleaning or repair.

YVith these and many other objects in view, which will readily appear as the nature of the invention is better understood, the same consists in the novel construction, combination, and arrangement of parts hereinafter 2 5 more fully described,illustrated, and claimed.

In the accompanyingdrawings, Figure 1 is a side elevation of a furnace constructed in accordance with my invention, part of the casing being removed to expose the interior construction. Fig. 2 is a vertical sectional view of the same on the line 2 2 of Fig. 1. Fig. 3 is a horizontal sectional view on the line 3 3 of Fig. 1.

Referring to the accompanying drawings,

3 5 A represents a rectangular cast-iron base,

upon which the furnace is mounted. Arising from each corner of the said rectangular base are the angle frame bars or columns B, connected together at the upper ends by the angular connecting-rails 0, connecting the upper ends of said columns with each other, and thus forming a strong and permanent furnaceframe inclosing the various parts of the heat- 7 ing devices. The said angle connecting-rails 4 5 0 form a continuous or encircling seat, which receives the inclosed heat or hot-air collecting and inclosingcoverD. The said coverD is made of the usual galvanized iron and is provided with a series of hot-air conductingpipes E, which receive the accumulated hot air and conduct the same to the various parts of the building to be heated. Each of the vertical corner columns Bis provided with the inner vertical strip-flanges b, which are secured to each end or side of said columns. The said flanges 11 are adapted to receive the casing-sections E, which closely fit between said flanges of each column upon all four sides of the furnace-frame and inclose the interior of the furnace. The said casing-sections are of the ordinary galvanized metal, and are in two sections for each of the foursides of the furnace. The intermediate edges of the side sections of the casing are connected to the intermediate casing bars or rails G. Each of the rails G is provided with the upwardly and downwardly extending receiving-flanges 9, that receive the upper and lower edges of the casing-sections, respectively, and said rails or bars are secured at each end to the corner angle-columns B. It will thus be seen that while the entire casing comprises two sections of sheet metal for each side of the furnace that the same are connected with the skeleton frame of the furnace in such a manner that the said sections can be quite easily and readily removed without disturbing the frame-work, as already set forth.

Inclosed within the casing F, which, as illustrated, comprises the various sections f, is the cast-iron fire-pot H, which may also be made of wrought-iron and firebrick lined, according to the option of the manufacturer. Said fire-pot I-I rests upon and is supported by the bottom cast-iron ash-pit I, communicatingtherewith, and provided with the ordinary draft-inclosed opening a, through which the ashes may be removed, and which also provides for a regulation of the draft of the furnace, being closed by the ordinary draft- 9o door t". Mounted in the bottom of the firebox II and over the ash pit or pan is the revolving grate J, having a center discharge and working on the ball-bearings j. An operating-lever his connected withsaid grate by means of the connecting-rod h, and thus provides for operating the grate when desired. The fire-pot H is provided with the ordinary filling-openin g K, extending through the front of the furnace and inclosed by the ordinary .door it, that is illustrated in the drawings. Connected with the fire-pot upon each side and extending slightly above the top of the same are the opposite smoke and combustion pipes L, supporting and communicating with the interior of the upper radiator M. The said radiator M consists of an inclosed casing, and is provided with a series of elongated parallelvertical hot-air tubes N, extending entirely through the same and receiving and heating the air ascending from the bottom of the furnace and around the fire-pot and conducts the same into the hotair-collecting cap D, located directly thereabove, from which the hot air is conducted out through the pipes E, above referred to. The smoke and combustion flues L are connected with said radiator M at each end and the bottom thereof, so that as the smoke and other products of combustion pass therefrom into the radiator that the same will be caused to pass from each end of the radiator toward each other and circuitously between and around the ends of the hot-air tubes N, through the flues 0, formed between each of the vertical hot-air tubes N. Diaphragm-strips P are located between alternate ends of the vertical tubes N and the walls of the radiator, thus causing the said smoke and other products of combustion to take the direction indicated by the arrowsthat is, first along the ends, the sides, and through the fines between the tubes circuitously to the central escape-pipe Q. The said escape-pipe Q, as stated, is connected with the said radiator at the center thereof, so that the draft is equalized through all the fines equally, and thus causes a more uniform heating of the air passing up through the hot-air tubes N, and therefore a more complete and greater amount of radiation than is ordinarily acquired by other furnaces. This construction of radiator and connections provides for a travel of thesmoke and products of combustion from both sides of the fire-pot in three directions at the same time and meeting at the central and common escape, which provides for greater efficiency and heating, as already stated. and set forth. A suitable hand-hole R is located in one side of the radiator, which provides means whereby the same may be readily cleaned out when necessary. It may also be noted at this point that the exact location of the radiator directly above the top of the fire-pot, while being the preferable construction, may nevertheless be located inrear of the same without in any way departing from the spirit of this invention.

A dust-flue S extends through the furnace and is connected with the bottom of the radiator directly at the mouth of the escapepipe and with the ash-pit I, the draft through Having thus described my invention, what I claim, and desire to secure by Letters Paten t, is-

1. In a furnace, the combination, with the rectangular base, of a series of angle cornerpieces or columns arising vertically from each corner of said base and provided with inner offstanding flanges, sectional incloslng casing-sheets secured within the flanges of said corner-pieces, intermediate casing rails or bars provided with upper and lower flanges receiving the intermediate edges of said casing-sheets and secured at the ends to said corner-pieces, and heating devices located within said casing, substantially as set forth.

In a furnace, the combination, with the rectangular base, of. a series of vertical angle corner-pieces or columns arising from each corner of said base and provided with inner oii'standing flanges, sectional inclosing casing-sheets secured within the flanges of said corner-pieces, angular connecting-rails connecting the upper ends of said columns or corner pieces with each other, an inclosed hotair cover seated and secured within said angular connecting-rails, and heating devices located within said casing, substantially as set forth.

3. In a hot-air furnace, the combination, with the casing and the fire-pot located therein, of an inclosed radiator-box adjacent to the fire-pot and provided with a series of elongated open hot-air tubes extending therethrough, diaphragm-strips located between alternate ends of said tubes and the walls of the radiator, opposite smoke and combustion pipes connected with opposite sides of the fire-pot and opposite ends of said radiator, and a central escape-pipe centrally connected to said radiator, substantially as set forth.

4. In a hot-air furnace, the combination, with the casing and the fire-pot located therein, of an inclosed rectangular radiator-box located directly above the fire-pot and provided with a series of elongated parallel open hot air tubes extending through said box, diaphragm-strips located between alternate ends of said tubes and the walls of the radiator to form circuitous smoke and combustion flues around said flues, opposite conducting and supporting pipes connected with opposite sides of the fire-box and opposite ends of the radiator-box to form opposite d rafts drawing to the center of said box, and a central escape-pipe connected with said radiator-box at the center thereof, substantially as set forth.

5. The combination, with a heater, of a radiator-box provided with a series of elongated parallel open hot-air tubes extending through alternate ends of said tubes and the walls of In testimony that I claim theforegoing as the radiator to form circuitous smoke and my own Ihave hereto afiixed my signature in 10 combustion fines, opposite conducting-pipes the presence of two witnesses.

connected with opposite sides of said heater and opposite ends of the radiator-box to form opposite drafts drawing to the center of said Witnesses:

box, and a central escape-pipe,substantially J N0. B. LANDIS, as set forth. 7 WM. FRIDLEY.

JACOB FRIDLEY. 

